mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 08:02:07 +00:00
5de4a473bd
The beast had a long and not very happy history. At one point, a friend (netdump) had asked that he open up a little. Well, the friend was long gone now, and the beast had this dangling piece hanging (netpoll_queue). It wasn't hard to stitch the netpoll_queue back in where it belonged and make everything tidy. Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/*
|
|
* linux/drivers/net/netconsole.c
|
|
*
|
|
* Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
|
|
*
|
|
* This file contains the implementation of an IRQ-safe, crash-safe
|
|
* kernel console implementation that outputs kernel messages to the
|
|
* network.
|
|
*
|
|
* Modification history:
|
|
*
|
|
* 2001-09-17 started by Ingo Molnar.
|
|
* 2003-08-11 2.6 port by Matt Mackall
|
|
* simplified options
|
|
* generic card hooks
|
|
* works non-modular
|
|
* 2003-09-07 rewritten with netpoll api
|
|
*/
|
|
|
|
/****************************************************************
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
****************************************************************/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/console.h>
|
|
#include <linux/tty_driver.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/netpoll.h>
|
|
|
|
MODULE_AUTHOR("Maintainer: Matt Mackall <mpm@selenic.com>");
|
|
MODULE_DESCRIPTION("Console driver for network interfaces");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static char config[256];
|
|
module_param_string(netconsole, config, 256, 0);
|
|
MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]\n");
|
|
|
|
static struct netpoll np = {
|
|
.name = "netconsole",
|
|
.dev_name = "eth0",
|
|
.local_port = 6665,
|
|
.remote_port = 6666,
|
|
.remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
|
|
};
|
|
static int configured = 0;
|
|
|
|
#define MAX_PRINT_CHUNK 1000
|
|
|
|
static void write_msg(struct console *con, const char *msg, unsigned int len)
|
|
{
|
|
int frag, left;
|
|
unsigned long flags;
|
|
|
|
if (!np.dev)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
for(left = len; left; ) {
|
|
frag = min(left, MAX_PRINT_CHUNK);
|
|
netpoll_send_udp(&np, msg, frag);
|
|
msg += frag;
|
|
left -= frag;
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static struct console netconsole = {
|
|
.name = "netcon",
|
|
.flags = CON_ENABLED | CON_PRINTBUFFER,
|
|
.write = write_msg
|
|
};
|
|
|
|
static int option_setup(char *opt)
|
|
{
|
|
configured = !netpoll_parse_options(&np, opt);
|
|
return 1;
|
|
}
|
|
|
|
__setup("netconsole=", option_setup);
|
|
|
|
static int init_netconsole(void)
|
|
{
|
|
int err;
|
|
|
|
if(strlen(config))
|
|
option_setup(config);
|
|
|
|
if(!configured) {
|
|
printk("netconsole: not configured, aborting\n");
|
|
return 0;
|
|
}
|
|
|
|
err = netpoll_setup(&np);
|
|
if (err)
|
|
return err;
|
|
|
|
register_console(&netconsole);
|
|
printk(KERN_INFO "netconsole: network logging started\n");
|
|
return 0;
|
|
}
|
|
|
|
static void cleanup_netconsole(void)
|
|
{
|
|
unregister_console(&netconsole);
|
|
netpoll_cleanup(&np);
|
|
}
|
|
|
|
module_init(init_netconsole);
|
|
module_exit(cleanup_netconsole);
|